U.S. Navy SEALs sometimes carry this semi-automatic sniper rifle, outfitted with either a 20- or 15-inch barrel. It's more than 45 inches long with that 20-inch barrel, but is far more accurate than the MK-18 used by most SEALs. It carries a 10 or 20-round magazine of 7.62mm rounds. Outfitted with a Nightforce scope, the SR-25 is accurate out to about a half-mile.
For the inside story on America's military operations around the world, check out Mark Thompson's blog, Battleland: Where military intelligence is not a contradiction in terms.